Does the "Fault" LED stay flashing on the RLC board? If so, verify the IM card is alive and that you can login to the IM board via telnet/ssh.

Is the OCP responsive? Can you navigate around? If so, see which component is lsited as RED in the component status area. If the OCP is not responsive at all, double check the RLC and IM are communicating with each other over the network (again the Eth cable connection is important).